Java vs Kotlin

Java vs Kotlin which one is better to choose? – Javaassignmenthelp

Java Assignment Help experts will explain you Java vs Kotlin in a better way. 

If you are a mobile app developer, Java is probably your language for building Android apps. But new languages ​​are popping up everywhere that might challenge Java’s dominance in the Android world.

One of them is Kotlin, a relatively new programming language, already announced by Google as a “first-class” language supported on Android.

Although it is continually meaning evolved and enhanced, Kotlin is now viewing a mature ecosystem and its demand is growing quickly, especially on the mobile development scene. 

Now, you will better understand about Java Vs Kotlin.

In Java vs Kotlin experts will explain Java to Kotlin story

Kotlin v1.0 was published only on 15, February 2016, the history of this programming language defines back to 2011. JetBrains founded Kotlin for their practical needs. 

The company had 70% of its outputs build on Java but began to understand its shortcomings – mainly unnecessary wordiness. 

They wanted a programming language that would be Java-compatible since rewriting everything into a new programming language appeared as a no-go option. Everybody started experimenting with Scala but were not fulfilled. That is when the concept of a new programming language, Kotlin, was born.

Java vs Kotlin

To know the differences between Java vs Kotlin, primarily, we determined to discuss a few about each language. We will begin with Java, and you will know its benefits, drawbacks and also what we can do with this language.

Next, we will converse about Kotlin, so that this language assists, benefits, limitations and what we can build? Finally, it will be great to get the key variations and benefits of Java vs Kotlin.

What is Java?

Java is a programming language created by James Gosling. We can create any type of program, it also supports almost any type of machine. It’s also for mobile in Linux operating system, Windows and Android.

Currently, Java has the most important and largest community in the world. In both the Internet and the computer field, this language is very important. Java can be used to do almost anything.

It should be considered that Java is completely free and can be used by anyone in the world. In this way, Java is a safe, powerful and universal programming language.

What can we program?

If you are an unimaginable programmer, you can perform anything with Java. With the most helpful websites, applications for Android, and among other things.

Second, if you are a novice on the subject of programming in Java, there is no difficulty because you can start with a simple hello world, and then become a programmer to change this world.

Pros of Java

  • Easy to learn and understand.
  • Works great for native as well as cross-platform apps.
  • Since Android is built on Java itself, there are a lot of Java libraries to help you. Moreover, Java has a wide open-source ecosystem.
  • Java apps are even lighter and more compact than The Kotlin Apps, resulting in the faster app experience.
  • Java also provides a faster manufacturing process with more code in a short time.
  • Thanks to proceeding assembly with Gradle, collecting large projects becomes easier in Java.

Cons of Java

  • Java is a kind of heavy language, which means you write too much code, which increases the errors and bugs.
  • Java experiences some problems with Android API design due to inherent limitations.
  • Java requires more memory than other languages and therefore slows down.

Future Scope in Java

As a career for Java developers/programmers, anyone can consider the following job roles.

  • Web developer
  • Application developer
  • EJB programmer
  • Software developer
  • Tester
  • Graphic designer
  • A professional teacher in Java

What is Kotlin?

Kotlin is a new programming language of JetBrains. It first surfaced in 2011. “Kotlin” named his project was unveiled. Kotlin is an open-source language.

Basically like Java, C, and C++ – Kotlin too. But it is different from Java. Here our experts will help you to tell about Java vs Kotlin.

“Statically Typed Programming Languages” (is. Legally typed programming languages are languages that do not need to be defined before using variables. This means that static typing has to be done with a clear declaration or initialization of variables before they are planned.

Java was earlier said to be an example of a static typed language, similarly, C and C++ are also static typed languages.

Static typing does not mean that we have to use all the variables before declaring them. Variables in the program can be initialized anywhere and we (developers) need to do so anywhere in the program to use those variables.

Consider the following example of Java vs Kotlin

/* Java Code */

static int num1, num2; //explicit declaration

num1 = 10; //use the variables anywhere

num2 = 20;

/* Kotlin Code*/

val a: Int

val b: Int

a = 10

b = 20

In addition to the classes and methods of object-oriented programming, Kotlin also supports procedural programming with the use of functions.

Like Java, C and C++, the entry point of the Kotlin program “The main A function named “. Basically, it passed an array containing any command-line logic.

Consider the following example of Java vs Kotlin

/* Kotlin Programming*/

/* Hello Word Example*/

package hello //optional package header

fun main(args: Array < String > ) { //The function package level, which returns the unit and takes an array of strings as parameters

 val scope = “world”

 println(“Hello, $scope!”) //Semicolons are optional, have you seen


Filename extensions of the Java are .java, .class, .jar but on the other hand filename extensions of the Kotlin are .kt and .kts.

What can we create?

With Kotlin we can make many things, whichever comes to mind. Some of the projects that are built-in Kotlin are Pinterest, Flipboard, Square, etc.

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Pros of Kotlin

  • Kotlin is fast to write and, therefore, is very much liked by developers. If it takes 50 lines of code in Java, it takes only 1-2 lines in Kotlin. This also means that there are many fewer errors and bugs.
  • Kotlin aids in building a clean API.
  • Thanks to Java bytecodes, you can use Java libraries and frameworks in Kotlin, thereby converting Kotlin from Java into a seam.
  • Kotlin needs a lot in his kind of system, something that was missing in Java. Android uses null to represent the absence of a value and Kotlin lets you use null, that reduces the pain point very low.
  • The Anko library available for Kotlin is very helpful for developers and has a very active and detailed collection of projects on Github.

Cons of Kotlin

  • There is definitely a learning curve with Kotlin. It is the very short syntax, while a great benefit, requires some learning.
  • Kotlin shows a slower compilation speed than Java in most cases, even if it defeats Java in some instances.
  • The Kotlin community is still young and learning resources are limited, so finding answers to problems can be a bit difficult. However, with its growing popularity, resources and community will expand in time.
  • Since Kotlin is still new, finding experienced developers who can act as mentors for your team can be a bit difficult. Everyone is still learning and experiencing it.
  • Some features of Android Studio such as auto-completion and compliance run slower in Kotlin than java.

Difference Between Java vs Kotlin

Null Safety

As mentioned earlier, Kotlin avoids NullPointerException. Whenever NullPointerException can be thrown, The Kotlin fails at compile-time.

Data Classes 

Kotlin consists of boilerplate data classes, hashcodes, tostring, getters/setters and much more such as boilerplates lead to autogeneration.

Consider the following example of Java vs Kotlin

/* Java programming */

class Book {

 private String title;

 private Author author;

 public String getTitle() {

 return title;


 public void setTitle(String title) {

 this.title = title;


 public Author getAuthor() {

 return author;


 public void setAuthor(Author author) { = author;



But the above one class in Kotlin may be briefly defined in a row

/* kotlin programming */

data class Book(var title: String,

 var author: Author)

It will also allow us to easily make copies of data classes with the help of copy()

val book = Book(“Kotlin”, “JetBrains”)

val copy = book.copy()

Extension Functions 

Kotlin allows us to expand the functionality of existing classes without having inherited from them. That is to say, Kotlin provides the ability to extend a class with new functionality without inheriting from the class. 

This is done by expansion works. To declare an extension function, we have to prefix its name with a receiver type, that is. The type is being increased.

The following adds a swap function to MutableList<List> –

fun MutableList < Int > .swap(index1: Int, index2: Int) {

 val tmp = this[index1]

 this[index1] = this[index2]

 this[index2] = tmp


The ‘this’ keyword inside the extension function belongs to the receiver object, which is passed before the dot.

Now we can call such a function on any MutableList<Int> –

val abc = mutableListOf(1, 2, 3)

abc.swap(0, 2)

Smart Casts 

When it comes to casts, the Kotlin compiler is intelligent. In many cases, one does not need to use the cast operators of clear in Kotlin, but for irreversible values in Kotlin and inserts casts become required automatically

fun demo(x: Any) {

 if (x is String) {

 print(x.length) // x is automatically cast to string



Type Inference 

In Kotlin, a great thing is that you don’t need to explicitly specify the type of each variable (clearly and in a detailed manner). But if you want to explicitly define the data type, you can do the same.

Consider the following example of Java vs Kotlin

/* not explicitly defined */

fun main(args: Array < String > ) {

 val text = 10



/* explicitly defined */

fun main(args: Array < String > ) {

 val text: Int = 10



Functional Programming 

The main important thing is that Kotlin is a functional programming language. Originally Kotlin includes several useful methods, including high-order tasks, long-rate expressions, operator overloading, lazy valuations, operator overloading and much more.

Functional programming makes Kotlin much more useful when it comes to collections–

fun main(args: Array < String > ) {

 val numbers = arrayListOf(15, -5, 11, -39)

 val nonNegativeNumbers = numbers.filter {

 it >= 0




Output – 15, 11

High – Command tasks are functions that act as a parameter and also return a function.

Consider the following code of Java vs Kotlin

fun alphaNum (func: () -> unit){}

In the code above, The name of the parameter “func” is the name of the parameter and the name of the parameter is “() -> Unit the function type. In this case, we are saying that func will be a function that does not achieve any parameters as well as does not return any value.

Lambda expression or an anonymous function is a “Literal function, that is, a function that is not declared, but passed as an expression.

val sum: (Int, Int) – > Int = {


 y – > x + y


In the above example, we declare only the variable ‘total’ that takes two integers and adds them together and returns as an integer.

Then we use ‘sum(2,2)’ to call it.

An anonymous function is a function that allows us to specify the return type and the function name is omitted in it.

Consider the following example of Java vs Kotlin

Either this way –

fun(x: Int, y: Int): Int = x + y

or This Way

fun(x: Int, y: int): Int {

 return a + b



Despite all the benefits of Kotlin, if you’re asking questions, “Which better, Java vs Kotlin? The answer is not easy.

Kotlin has come a long way, even though it is still in the early stages of version 1.2. The Kotlin code is secure and more concise than Java code.

Kotlin is not only useful for new applications, but its files can come co-existence with Java files – that means there’s scope for existing applications too.

Today, On Java Vs Kotlin, students have many doubts. So, that’s why java assignment help experts explained the difference between Java and Kotlin.

Of course, Java has been around for years, and there is a wealth of Java developers in the IT industry, including application development companies – but not in Kotlin’s case. The market is still struggling to cope with the demand for language and is not able to fully meet the supply portion.

Now you know about the Java vs Kotlin. If you need any programming assignment help related to java programming assignment help, or java assignment help our experts are available to provide you the best java project help and java homework help which will increase your academic records.

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